Object Location Measurement Method and Augmented Reality Service Providing Device Using the Same

1. An augmented reality service providing device, comprising: a sensor to photograph an object and to measure a current position of a mobile terminal; a communicator to measure a communication distance between the mobile terminal and the object; a controller to control to repeat a plurality of times the measurements of the current position and the communication distance while the mobile terminal is moving; a calculator to calculate an estimated position of the object based on the current position and the communication distance measured repeatedly the plurality of times; and a display to display virtual information on the object on the estimated position of the object, wherein the controller generates a plurality of virtual anchors for each predetermined distance when the mobile terminal moves in an indoor space in which the object is located, controls the sensor to measure the current position of the mobile terminal in the plurality of virtual anchors wherein positions of the plurality of virtual anchors change as the mobile terminal moves, and controls the communicator to measure the communication distance between the mobile terminal and the object.

2. The augmented reality service providing device of claim 1 , wherein the sensor comprises a camera and an inertial measurer, and measures the current position of the mobile terminal through Visual Inertial Odometry (VIO).

3. The augmented reality service providing device of claim 1 , wherein the communicator measures the communication distance based on an intensity of a receiving signal received from the object.

4. The augmented reality service providing device of claim 1 , wherein the calculator calculates the estimated position of the object using a multilateration method.

5. The augmented reality service providing device of claim 1 , wherein the communicator receives the virtual information from the object and transmits a control signal for controlling the object to the object.

6. The augmented reality service providing device of claim 1 , wherein the controller labels the estimated position of the object on the virtual information.

7. The augmented reality service providing device of claim 1 , further comprising an input device for a user to control the object.

8. The augmented reality service providing device of claim 7 , wherein the controller generates a control signal according to the user's input from the user.

9. An object location measurement method to visualize an object in augmented reality, comprising: generating a plurality of virtual anchors for each predetermined distance when a mobile terminal moves in an indoor space in which the object is located; controlling a sensor to measure a current position of the mobile terminal in the plurality of virtual anchors wherein positions of the plurality of virtual anchors change as the mobile terminal moves; controlling a communicator to measure a communication distance between the mobile terminal and the object; measuring the current position of the mobile terminal and the communication distance between the mobile terminal and the object; repeating a plurality of times the measurements of the current position and the communication distance while the mobile terminal is moving; and calculating an estimated position of the object based on the current position and the communication distance measured repeatedly the plurality of times.

10. The object location measurement method of claim 9 , wherein the measuring the current position of the mobile terminal is performed through VIO (Visual Inertial Odometry).

11. The object location measurement method of claim 9 , wherein the measuring the communication distance between the mobile terminal and the object is performed by measuring the communication distance based on an intensity of a receiving signal received from the object.

12. The object location measurement method of claim 9 , wherein the calculating the estimated position of the object is performed by calculating the estimated position of the object using a multilateration method.